Rotary



H. G. SPALDING 8v G. STIOKNBY.

ROTARY PUMP.

Patented Apr. 20, 1852.

i'IiFFTQ 1 1 H. O. SPALDING AND G. STIGKNEY, OF HARTFORD, CONNECTICUT.

ROTARY PUMP.

Specification of Letters Patent No. 8,893, dated April 20, 1852.

To all whom it may concern:

Be it known that we, HENRY C. SPALDING and GAGE STICKNEY, of Hartford,in the county of Hartford and State of Connecticut, have invented a newand Improved Rotary Pump; and we do hereby declare that the following isa full, clear, and eXact description of the construction and operationofthe same, reference being had to the annexed drawings, making a part ofthis specification, in which- Figure 1, is a front view of the pump inelevation. Fig. 2, is a horizontal section of the case taken at the lineX, X, Fig. 1, the flanch and shaft not being bisected. Fig. 3, is afront View in elevation, the case being out vertically through thecenter, and the part nearest the eye removed, a portion of the front ofthe eduction tube being also re moved, as also the front of the chamberim- ,mediately over the injection pipe adjoining one of the side platesand inclosing the aperture in the side plate. The screw and shaft spiralcurve and forms right angles with the shaft, these portions of thefianch bear against the side plates of the case; there is an inductionaperture through one of the side plates and an eduction aperture throughthe other and the ends of the spiral flanch above mentioned pass overand close both these apertures at necessary intervals as the flanchrevolves; the ends of the fianch passing each other as the fianch makesrather more than one revolution around the shaft, the above arrangementin connection with a sliding valve (which will be hereafter described)for preventing back draft when both the apertures are open constitutethe invention.

To enable others skilled in the art to make and use our invention wewill proceed to describe its construction and operation.

A, is a circular case, having the side plates B, B, attached to it byscrew bolts (a), in

the center of the case A, a shaft C, is placed, around which is a spiralflanch D, said fianch forming a part of a thread of a screw this will beclearly seen by referring to Figs. 2, and 3, the outer surface of thisfianch works tightly againstthe inner surface of the case A, by means ofany suitable packing (b); the ends (0) (0) of the fianch pass each othersee Fig. 3, or in other words the flanch makes rather more than onerevolution around the shaft C.

(d) is the induction aperture through the side plate B, and (c) is theeduction aperture through the side plate B, these aperturespass throughthe side plates at opposite points see dotted lines in Fig. 3.

E, is the induction pipe which passes into a well or reservoir, thispipe connects with a chamber F, which is attached to the side plate B,and covers the induction aperture (CZ) Figs. 2 and 3.

G, is the eduction tube attached to the side plate B, the water isforced into this tube through the eduction orifice H, is a shaft whichpasses through the shaft C, one end of the shaft H, fits in the centerof the inner side of the side plate B, the other end passes through astufiing box (f) at the center of the side plate B, the power is appliedto this shaft.

I, is a valve which vibrates through the eduction aperture (0), thisvalve is pressed out of the case A, and into the eduction tube Gr, bythe flanch D, as it rotates, the end (9) of the valve bearing againstthe side of the flanch see Figs. 2 and 3, the end (9) of the valve is soshaped as to fit snugly against the side of the fianch and conform toits curvature, and any wear caused by friction will only tend to makethe end (9) of the valve sit closed to the side of the flanch.

J, is a spiral spring inclosed within the eduction tube one end bearingagainst the end (it) of the valve 1, this spring tends to keep the end(9) of the valve always close against the side of the flanch, one sideof the valve works in a recess in the inner surface of the case A, andthe other side bears closely against the shaft C, that is as much of thevalve as is within the case.

The several parts of the pump are now described and the operation nowremains to be described.

Power being applied to the shaft H, the flanch D, revolves within thecase A, the

that the two ends of the fianch (0) are bent out of the spiral curve sothat they bear against the inner surface of the side plates. By thisarrangement both apertures (d) (e) are closed while the slide is thrownout from the case, as the ends (0) (0) pass each other, or the fianchmakes rather more than one revolution on the shaft C, and when the end(0') adjoining the side plate B, has passed the eduction aperture theslide 1, is thrown by the spiral spring across the end of the fianch (0)adjoining the side plate B, and against the side of the fianch as seenin Fig. 2. This valve then is a cut off, and prevents any back draft orreaction when the ends (0) (0) of the fianch do not cover the inductionand eduction apertures, the ends of the fianch are so bent that theinduction aperture is closed till the end (0) then passes the inductionaperture and the water is allowed to enter the pump;

The above arrangement of pumps is sim- ,ple, is not liable to get out ofrepair, and

in practice works well by employing suitable packing on the outersurface of the fianch leakage is not likely to occur and the valve worksperfectly tight as the wear attendant upon friction only serves to fitthe end (9) of the valve closer to the side of the fianch.

Having thus described the nature and operation of our invention, what weclaim as new and desire to secure by Letters Patent, is a The spiralfianch D, working within a circular case A, said fianch beingconstructed as described in combination with the sliding valve I, thespiral fianch and valve operating in the manner and for the purposesubstantially as herein shown and specified.

Witnesses:

CHAS. R. CHAPMAN, R. G. DRAKE.

